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Environmental fate & pathways

Hydrolysis

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Description of key information

In contact with water Bis(2-propylheptyl) hexanedioate is considered to hydrolyse slowly.

Key value for chemical safety assessment

Additional information

In accordance with Annex VIII, column 2 (9.2.2.1) of Regulation (EC) No. 1907/2006, the testing for hydrolysis as a function of pH is not required as Bis(2-propylheptyl) hexanedioate is readily biodegradable (cf. chapter 5.2). Nevertheless, some information on the potential to hydrolyse of the source chemical Bis(2-ethylhexyl) adipate, i.e. a close structural analogue to the target substance is available (for details see justification document in chapter 13). Generally, as Bis(2-ethylhexyl) adipate does contain carboxylic ester groups, hydrolysis may be possible to some extent. The stability of Bis(2-ethylhexyl) adipate at pH 13.5, the low reactions rate at an increased temperature, and the partial saponification under alcoholic and acidic conditions (11% and pH 2), permits the conclusion, that the hydrolytic degradation of Bis(2-ethylhexyl) adipate runs slowly under natural conditions (Brown 1983, cited in Hirzel 1996). This conclusion is confirmed for the target chemical Bis(2-propylheptyl) hexanedioate by a calculation using Hydrowin v2.00, which revealed hydrolytic stability in a range of several months to years (BASF 2013).